javascript - 在 JavaScript 中按属性过滤 JSON 数据

Question

我有一个 JSON 序列化集合:

[
    {
        "_id":"person1",
        "date":"7/20/2014 17:20:09",
        "listed_name":"Tom",
        "name":"Tom",
        "contact_info":"<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="33475c5e73545e525a5f1d505c5e" rel="noreferrer noopener nofollow">[email protected]</a>"
    },
    {
        "_id":"person2",
        "date":"7/20/2014 17:20:09",
        "listed_name":"Jane",
        "name":"Jane",
        "contact_info":"<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="b5e5d0c7c6dadb87f5d2d8d4dcd99bd6dad8" rel="noreferrer noopener nofollow">[email protected]</a>"
    },
    {
        "_id":"person3",
        "date":"7/20/2014 17:20:09",
        "listed_name":"John",
        "name":"John",
        "contact_info":"<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="12427760617d7c2152757f737b7e3c717d7f" rel="noreferrer noopener nofollow">[email protected]</a>"
    }
]

以及来自另一个页面的属性名称信息...

["_id", "date", "listed_name"]

问题是...

使用 JavaScript，如何使用第二个数组作为过滤器以仅返回第二个数组中包含的列？

例如:使用这个数组["_id"]...这个数组如何用于只显示所有JSON对象的_id数据而不显示日期、listed_name、名称等...？

使用 ["_id"] 数组作为过滤器，预期的控制台输出应如下所示:

person1
person2
person3

Answer 1

假设您将传入的 JSON 放在变量中。

var parsedJSON = JSON.parse(inputJSON)
var filterArray = ["_id", "date"]

for (var i = 0; i < parsedJSON.length; ++i) {
    for (var filterItem in filterArray) {
        console.log(parsedJSON[i][filterArray[filterItem]])
    }
}